1 /*
2 * cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
3 * Copyright (C) 2005 Martin Vaughan
4 *
5 * Audio source switching for Adaptec AVC-2410 added by Trev Jackson
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22
23 #include <linux/module.h>
24 #include <linux/types.h>
25 #include <linux/ioctl.h>
26 #include <asm/uaccess.h>
27 #include <linux/i2c.h>
28 #include <linux/i2c-id.h>
29 #include <linux/videodev.h>
30 #include <media/v4l2-common.h>
31
32 MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
33 MODULE_AUTHOR("Martin Vaughan");
34 MODULE_LICENSE("GPL");
35
36 static int debug = 0;
37
38 module_param(debug, bool, 0644);
39
40 MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On");
41
42 static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
43
44
45 I2C_CLIENT_INSMOD;
46
47 /* ----------------------------------------------------------------------- */
48
49 static int cs53l32a_write(struct i2c_client *client, u8 reg, u8 value)
50 {
51 return i2c_smbus_write_byte_data(client, reg, value);
52 }
53
54 static int cs53l32a_read(struct i2c_client *client, u8 reg)
55 {
56 return i2c_smbus_read_byte_data(client, reg);
57 }
58
59 static int cs53l32a_command(struct i2c_client *client, unsigned int cmd,
60 void *arg)
61 {
62 struct v4l2_routing *route = arg;
63 struct v4l2_control *ctrl = arg;
64
65 switch (cmd) {
66 case VIDIOC_INT_G_AUDIO_ROUTING:
67 route->input = (cs53l32a_read(client, 0x01) >> 4) & 3;
68 route->output = 0;
69 break;
70
71 case VIDIOC_INT_S_AUDIO_ROUTING:
72 /* There are 2 physical inputs, but the second input can be
73 placed in two modes, the first mode bypasses the PGA (gain),
74 the second goes through the PGA. Hence there are three
75 possible inputs to choose from. */
76 if (route->input > 2) {
77 v4l_err(client, "Invalid input %d.\n", route->input);
78 return -EINVAL;
79 }
80 cs53l32a_write(client, 0x01, 0x01 + (route->input << 4));
81 break;
82
83 case VIDIOC_G_CTRL:
84 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
85 ctrl->value = (cs53l32a_read(client, 0x03) & 0xc0) != 0;
86 break;
87 }
88 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
89 return -EINVAL;
90 ctrl->value = (s8)cs53l32a_read(client, 0x04);
91 break;
92
93 case VIDIOC_S_CTRL:
94 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
95 cs53l32a_write(client, 0x03, ctrl->value ? 0xf0 : 0x30);
96 break;
97 }
98 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
99 return -EINVAL;
100 if (ctrl->value > 12 || ctrl->value < -96)
101 return -EINVAL;
102 cs53l32a_write(client, 0x04, (u8) ctrl->value);
103 cs53l32a_write(client, 0x05, (u8) ctrl->value);
104 break;
105
106 case VIDIOC_LOG_STATUS:
107 {
108 u8 v = cs53l32a_read(client, 0x01);
109 u8 m = cs53l32a_read(client, 0x03);
110 s8 vol = cs53l32a_read(client, 0x04);
111
112 v4l_info(client, "Input: %d%s\n", (v >> 4) & 3,
113 (m & 0xC0) ? " (muted)" : "");
114 v4l_info(client, "Volume: %d dB\n", vol);
115 break;
116 }
117
118 default:
119 return -EINVAL;
120 }
121 return 0;
122 }
123
124 /* ----------------------------------------------------------------------- */
125
126 /* i2c implementation */
127
128 /*
129 * Generic i2c probe
130 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
131 */
132
133 static struct i2c_driver i2c_driver;
134
135 static int cs53l32a_attach(struct i2c_adapter *adapter, int address, int kind)
136 {
137 struct i2c_client *client;
138 int i;
139
140 /* Check if the adapter supports the needed features */
141 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
142 return 0;
143
144 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
145 if (client == 0)
146 return -ENOMEM;
147
148 client->addr = address;
149 client->adapter = adapter;
150 client->driver = &i2c_driver;
151 snprintf(client->name, sizeof(client->name) - 1, "cs53l32a");
152
153 v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
154
155 for (i = 1; i <= 7; i++) {
156 u8 v = cs53l32a_read(client, i);
157
158 v4l_dbg(1, debug, client, "Read Reg %d %02x\n", i, v);
159 }
160
161 /* Set cs53l32a internal register for Adaptec 2010/2410 setup */
162
163 cs53l32a_write(client, 0x01, (u8) 0x21);
164 cs53l32a_write(client, 0x02, (u8) 0x29);
165 cs53l32a_write(client, 0x03, (u8) 0x30);
166 cs53l32a_write(client, 0x04, (u8) 0x00);
167 cs53l32a_write(client, 0x05, (u8) 0x00);
168 cs53l32a_write(client, 0x06, (u8) 0x00);
169 cs53l32a_write(client, 0x07, (u8) 0x00);
170
171 /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
172
173 for (i = 1; i <= 7; i++) {
174 u8 v = cs53l32a_read(client, i);
175
176 v4l_dbg(1, debug, client, "Read Reg %d %02x\n", i, v);
177 }
178
179 i2c_attach_client(client);
180
181 return 0;
182 }
183
184 static int cs53l32a_probe(struct i2c_adapter *adapter)
185 {
186 if (adapter->class & I2C_CLASS_TV_ANALOG)
187 return i2c_probe(adapter, &addr_data, cs53l32a_attach);
188 return 0;
189 }
190
191 static int cs53l32a_detach(struct i2c_client *client)
192 {
193 int err;
194
195 err = i2c_detach_client(client);
196 if (err) {
197 return err;
198 }
199 kfree(client);
200
201 return 0;
202 }
203
204 /* ----------------------------------------------------------------------- */
205
206 /* i2c implementation */
207 static struct i2c_driver i2c_driver = {
208 .driver = {
209 .name = "cs53l32a",
210 },
211 .id = I2C_DRIVERID_CS53L32A,
212 .attach_adapter = cs53l32a_probe,
213 .detach_client = cs53l32a_detach,
214 .command = cs53l32a_command,
215 };
216
217
218 static int __init cs53l32a_init_module(void)
219 {
220 return i2c_add_driver(&i2c_driver);
221 }
222
223 static void __exit cs53l32a_cleanup_module(void)
224 {
225 i2c_del_driver(&i2c_driver);
226 }
227
228 module_init(cs53l32a_init_module);
229 module_exit(cs53l32a_cleanup_module);
230
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